<template>
  <section class="loginContainer">
    <div class="loginInner">
      <div class="login_header">
        <h2 class="login_logo">俊哥外卖</h2>
        <div class="login_header_title">
          <a
            href="javascript:;"
            :class="{ on: !isShowPwd }"
            @click="isShowPwd = false"
            >短信登录</a
          >
          <a
            href="javascript:;"
            :class="{ on: isShowPwd }"
            @click="isShowPwd = true"
            >密码登录</a
          >
        </div>
      </div>
      <div class="login_content">
        <form @submit.prevent="login">
          <div v-if="!isShowPwd" class="on">
            <section class="login_message">
              <input
                type="tel"
                maxlength="11"
                placeholder="手机号"
                v-model="phone"
              />
              <button
                :disabled="!isRightPhone"
                :class="{ right_phone_number: isRightPhone }"
                @click.prevent="getCode"
                class="get_verification"
              >
                {{ cpmputeTime ? `已发送${cpmputeTime}s` : "获取验证码" }}
              </button>
            </section>
            <section class="login_verification">
              <input
                type="tel"
                maxlength="8"
                placeholder="验证码"
                v-model="code"
              />
            </section>
            <section class="login_hint">
              温馨提示：未注册硅谷外卖帐号的手机号，登录时将自动注册，且代表已同意
              <a href="javascript:;">《用户服务协议》</a>
            </section>
          </div>
          <div v-else class="on">
            <section>
              <section class="login_message">
                <input
                  type="tel"
                  maxlength="11"
                  placeholder="手机/邮箱/用户名"
                  v-model="name"
                />
              </section>
              <section class="login_verification">
                <input
                  :type="isShowP ? 'test' : 'password'"
                  v-model="pwd"
                  maxlength="8"
                  placeholder="密码"
                />
                <div
                  class="switch_button"
                  :class="isShowP ? 'on' : 'off'"
                  @click="isShowP = !isShowP"
                >
                  <div class="switch_circle" :class="{ right: isShowP }"></div>
                  <span class="switch_text">{{ isShowP ? "123" : "" }}</span>
                </div>
              </section>
              <section class="login_message">
                <input
                  type="text"
                  maxlength="11"
                  placeholder="验证码"
                  v-model="captcha"
                />
                <img
                  class="get_verification"
                  src="http://localhost:4000/captcha"
                  alt="captcha"
                  ref="captcha"
                  @click="getCaptcha"
                />
              </section>
            </section>
          </div>
          <button class="login_submit">登录</button>
        </form>
        <a href="javascript:;" class="about_us">关于我们</a>
      </div>
      <a href="javascript:" class="go_back" @click="$router.back()">
        <i class="iconfont icon-jiantou1"></i>
      </a>
    </div>
  </section>
</template>

<script type="text/ecmascript-6">
import { Dialog } from "vant";
import { reqSendCode, reqLoginSms, reqPwdLogin } from "../../api";
import { RECEIEVE_USER_INFO } from "../../store/mutations._type";

export default {
  name: "Login",
  data() {
    return {
      isShowPwd: false, //用于显示短信登录还是，密码登录 true :显示短信登录界面，false：显示密码登录界面
      isShowP: false, // 密码是否可见
      phone: "", //手机号
      code: "", //短信验证码
      name: "", //账号
      pwd: "", //登录密码
      captcha: "", //验证码

      cpmputeTime: 0, // 60s倒计时的值
    };
  },
  computed: {
    // 判断是否是一个正确的手机号  返回值为布尔值
    isRightPhone() {
      return /^1\d{10}$/.test(this.phone);
    },
  },
  methods: {
    // 提示框(vant中的组件)
    alertTip(message) {
      Dialog.alert({
        message,
        width: "250px",
      });
    },
    // 异步获取验证码
    async getCode() {
      // 启动60s倒计时效果

      if (!this.cpmputeTime) {
        //这个if判断主要防止多次点击产生多个定时器。当cpmputeTime为0时进入定时器。当cpmputeTime有值时为false禁止触发定时器。
        this.cpmputeTime = 60;
        clearInterval(this.setIntervalId);
        this.setIntervalId = setInterval(() => {
          !this.cpmputeTime--;
          if (!this.cpmputeTime === 0) {
            clearInterval(this.setIntervalId);
          }
        }, 1000);
        //发送ajax请求（向指定手机号发送验证码短信）
        await reqSendCode(this.phone);
        if (result.code === 1) {
          // 提示获取验证码失败
          this.alertTip(result.msg);
          // 停止倒计时 让cpmputeTime等于0
          if (this.cpmputeTime) {
            this.cpmputeTime = 0;
            clearInterval(this.setIntervalId);
          }
        }
      }
    },
    //异步登录
    async login() {
      //前台验证表单登录
      const {
        phone,
        pwd,
        code,
        captcha,
        name,
        isRightPhone,
        isShowPwd,
        alertTip,
        getCaptcha,
      } = this;
      let result;
      if (!isShowPwd) {
        //手机号登录
        if (!isRightPhone) {
          // 手机号不正确
          alertTip("手机号不正确");
          return;
        } else if (!/^\d{6}$/.test(code)) {
          // 短信验证码不正确
          alertTip("短信验证码不正确");
          return;
        }
        // 发送ajax短信登录    后台会验证手机号和验证码参数。要写我自己真实的手机号和验证码
        result = await reqLoginSms({ phone, code });
      }
      if (isShowPwd) {
        // 密码登录
        if (!name) {
          // 用户名不正确
          alertTip("用户名不正确");
          return;
        } else if (!pwd) {
          // 密码不正确
          alertTip("密码不正确");
          return;
        } else if (!captcha) {
          // 验证码不正确
          alertTip("验证码不正确!");
          return;
        }
        // 发送ajax 密码登录   后台会验证账户密码，图片验证码参数
        result = await reqPwdLogin({ name, pwd, captcha });
      }
      // 根据结果数据处理
      if (result.code === 0) {
        // 响应到成功的数据
        const user = result.data;
        // 需要将结果数据保存到vuex中
        this.$store.dispatch("saveUser", user);
        console.log(this.$store.state.user);
        // 跳转路由到个人中心
        this.$router.replace("/profile");

        // 停止倒计时 让cpmputeTime等于0
        if (this.cpmputeTime) {
          this.cpmputeTime = 0;
          clearInterval(this.setIntervalId);
        }
      } else {
        // 响应到失败的数据
        // 显示警告提示
        alertTip(result.msg);
        // x显示新的图片验证码
        getCaptcha();
        captcha = "";
      }
    },
    // 获取新的图片验证码
    getCaptcha() {
      // 每次指定的src要不一样，才能实现每次点击都能获取不一样的图片  获取当前img的ref giantref里的src
      this.$refs.captcha.src =
        "http://localhost:4000/captcha?time=" + Date.now();
    },
  },
  components: {
    [Dialog.Component.name]: Dialog.Component,
  },
  beforeRouteEnter(to, from, next) {
    next((vm) => {
      const token = vm.$store.state.user.token;
      if (token) next("/profile");
      else next();
    });
  },
};
</script>

<style lang="stylus" rel="stylesheet/stylus">
@import '../../common/stylus/mixins.styl'
.loginContainer
  width 100%
  height 100%
  background #fff
  .loginInner
    padding-top 60px
    width 80%
    margin 0 auto
    .login_header
      .login_logo
        font-size 40px
        font-weight bold
        color #02a774
        text-align center
      .login_header_title
        padding-top 40px
        text-align center
        >a
          color #333
          font-size 14px
          padding-bottom 4px
          &:first-child
            margin-right 40px
          &.on
            color #02a774
            font-weight 700
            border-bottom 2px solid #02a774
    .login_content
      >form
        >div
          display none
          &.on
            display block
          input
            width 100%
            height 100%
            padding-left 10px
            box-sizing border-box
            border 1px solid #ddd
            border-radius 4px
            outline 0
            font 400 14px Arial
            &:focus
              border 1px solid #02a774
          .login_message
            position relative
            margin-top 16px
            height 48px
            font-size 14px
            background #fff
            .get_verification
              position absolute
              top 50%
              right 10px
              transform translateY(-50%)
              border 0
              color #ccc
              font-size 14px
              background transparent
              &.right_phone_number
                color #000000
          .login_verification
            position relative
            margin-top 16px
            height 48px
            font-size 14px
            background #fff
            .switch_button
              font-size 12px
              border 1px solid #ddd
              border-radius 8px
              transition background-color 0.3s, border-color 0.3s
              padding 0 6px
              width 30px
              height 16px
              line-height 16px
              color #fff
              position absolute
              top 50%
              right 10px
              transform translateY(-50%)
              &.off
                background #fff
                .switch_text
                  float right
                  color #ddd
              &.on
                background #02a774
              >.switch_circle
                // transform translateX(27px)
                position absolute
                top -1px
                left -1px
                width 16px
                height 16px
                border 1px solid #ddd
                border-radius 50%
                background #fff
                box-shadow 0 2px 4px 0 rgba(0, 0, 0, 0.1)
                transition transform 0.3s
                &.right
                  transform translateX(27px)
          .login_hint
            margin-top 12px
            color #999
            font-size 14px
            line-height 20px
            >a
              color #02a774
        .login_submit
          display block
          width 100%
          height 42px
          margin-top 30px
          border-radius 4px
          background #4cd96f
          color #fff
          text-align center
          font-size 16px
          line-height 42px
          border 0
      .about_us
        display block
        font-size 12px
        margin-top 20px
        text-align center
        color #999
    .go_back
      position absolute
      top 5px
      left 5px
      width 30px
      height 30px
      >.iconfont
        font-size 20px
        color #999
</style>
